Osetup.dll is a “Dynamic Link Library” (dll) file used by the Microsoft Office suite of applications. This file is generally used to control the various components & plugins that Office requires to run and is used every time you use an Office application on your PC. Unfortunately, this file is also a big cause of errors for your system, as it’s continually being damaged & corrupted. To ensure this is not a problem for your PC, you should use the tutorial on this page to repair it.
The errors that Osetup.dll normally shows are as follows:
- “This application failed to start because osetup.dll was not found. Re-installing the application may fix this problem.”
- “Cannot find [PATH] osetup.dll.”
- “X:outlookr.WWOsetup.DLL digital signature does not validate or is not present.”
The first step to curing this error is to manually start the installation of Office you might have been trying to do. If Office was “auto running” from the CD, then the chances are that your PC has been unable to read the various files that the CD has. This is a big problem, and is often the cause of the OSetup.dll error. To fix this, you should click onto the CD of your PC and then locate “Setup.exe”. This will load the setup & the files it needs.
If this doesn’t solve the problem, you should then look to copy the setup files to your hard drive, and then run the installation from your hard drive. You can do this by clicking on the onto the CD and then copying all the files it has inside. You should then browse to a hard drive and paste the files onto it, allowing your computer to read the files it needs to complete the installation in one central location.
After this, clean out the registry with a “registry cleaner”. This is highly recommended as the ‘registry’ of your computer is where Windows stores the files & settings that your computer & programs need to run. The registry is a large database which plays a vital role in the installation & operation of your computer. However, because this database is continually being used so much by Windows, your PC is constantly getting confused and saving many parts of it in the wrong way. To ensure this is not a problem, you should use a registry cleaner program to scan through this database and fix the various errors that are inside, allowing your PC to read the files it needs and run (much) smoother as a result.